Check my grammar, please...

[dana]

The agricultural sector is recognized at the third important sector after the manufacturing and service sector in contributing revenue to the country. According to the 3rd National Agricultural Policy, the agricultural sector will be transformed into a more modern, commercial and yet sustainable sector to fulfill the country’s food demand, quality and safety. The vegetable products development policy is to expand the production to cope the domestic demand and for export purposes. Introduction to the high technology production for high value vegetable using protected environment including the usage of rain shelters and netted structure has been introduced (Ministry of Agriculture, 1998 – 2010).

The fast growing industrial sectors and urbanization compete with agriculture for water sources, acts as a source of underground water pollution and this will push the agricultural activities to remote areas where water and salinity are the major problems. In regions where temperature and light allow plant growth and development, water is among most limiting factors for plant productivity. Water deficit is one of the most important environmental factors limiting crop productivity in the tropics. It develops when water loss by transpiration exceeds absorption by roots. Plants generally experience some degree of water deficit in the open field or under protected environment.

Rain shelters produce high quality crops, high yields and year-round excellence compare in the open field. It grown crops represent a shift from extensive production. Under rain shelters, the plants need optimal conditions, both above and below ground, down to the underlying roots. Control of temperature, relative humidity, airflow and atmosphere composition, water and fertilization supplies are imperative and giving directly to the roots constantly.

Irrigation is the major consumer of water in the area and therefore it must be carried out with high efficiency. It is expensive and as such, farmers must determine the correct timing and quantity to avoid waste. This scheduling depends on knowledge of many factors, including evapotranspiration, water-holding capacity of the soil, water needs of the crop, the consequence of insufficient water on crop performance (yield), available water for irrigation, and quality of irrigation water.

In plants, water is most important components to plant growth health. Water requirement of a crop is the quantity of water needed for normal growth, cell development, produce yield and supplied by precipitation, irrigation and both. Losses of water in plants will become many problems such as microorganism activity in the soil will be decrease; stomata closed, so that the transpiration process caused as a result accumulation of gases or metabolic wastes increases, leads to death of the plant. Generally, water is last through leaching, drainage, evapotranspiration and runoff. The following disadvantages observed due to water loss so soil becomes very hard therefore, the germination percentage decreased. When the nutrients in the soil leaches or evaporates, the root growth retards, so that plant stunted as a result yields reduced. Under irrigation causes reduction in photosynthesis due to reduction in photosynthetic rate, chlorophyll content and leaf area. Due to under irrigation hormonal balance is altered; reduction in fixation, uptake and assimilation of nitrogen takes place.

Excess irrigation are also causes several changes in the soil and plant resulting in reduced growth and in some cases death of plants. Germinating seeds are sensitive to water logging since they are very dependent on the surrounding soil space for oxygen supply. Effects over watering causes oxygen content in growing media is reduced by the higher average water content in the pores, resulting in damage to the roots. Respiration in the roots change from aerobic to anaerobic with the result, toxic substance accumulates in roots and damages the root system. Permeability of roots decreased due to shortage of oxygen. It results in decreases water and nutrient uptake. Therefore, fertigation technique is a one way to solve all the problems.

Fertigation technique means water and fertilizer are mix together and given at the same time using drip tubes. This technique is a relatively new method that offers several advantages to farmers because water and fertilizer placed more accurately in the root zone, at a slow rate so there is a little or no waste. This technique is economic because less water and less management are required while irrigating. The disadvantages are the added costs of the drip irrigation equipment. Fertigation technique can control the water and fertilizer supply at the optimum requirement need by crops.

The main objective of this study is to determine the best watering frequency of water supply and the best varieties of chilli on growth and physiological aspects grown under rain shelter. The specific objectives of this study are:

1. To assess the effects of increasing frequency of watering application from 4 times to 8 times per day on growth and physiological aspects.

2. To compare the responses of two different varieties of chilli on growth and physiological aspects.

3. To determine the most efficiency variety on water use efficiency.

4. To determine the best watering frequency and the best variety that could gave high yield.

[Mister Micawber]

.
I have emboldened problem areas, Dana:

The agricultural sector is recognized at the third important sector after the manufacturing and service sector in contributing revenue to the country. According to the 3rd National Agricultural Policy, the agricultural sector will be transformed into a more modern, commercial and yet sustainable sector to fulfill the country’s food demand, quality and safety. The vegetable products development policy is to expand the production to cope the domestic demand and for export purposes. Introduction to the high technology production for high value vegetable using protected environment including the usage of rain shelters and netted structure has been introduced (Ministry of Agriculture, 1998 – 2010).

The fast growing industrial sectors and urbanization compete with agriculture for water sources, acts as a source of underground water pollution and this will push the agricultural activities to remote areas where water and salinity are the major problems. In regions where temperature and light allow plant growth and development, water is among most limiting factors for plant productivity. Water deficit is one of the most important environmental factors limiting crop productivity in the tropics. It develops when water loss by transpiration exceeds absorption by roots. Plants generally experience some degree of water deficit in the open field or under protected environment.

Rain shelters produce high quality crops, high yields and year-round excellence compare in the open field. It grown crops represent a shift from extensive production. Under rain shelters, the plants need optimal conditions, both above and below ground, down to the underlying roots. Control of temperature, relative humidity, airflow and atmosphere composition, water and fertilization supplies are imperative and giving directly to the roots constantly.

Irrigation is the major consumer of water in the area and therefore it must be carried out with high efficiency. It is expensive and as such, farmers must determine the correct timing and quantity to avoid waste. This scheduling depends on knowledge of many factors, including evapotranspiration, water-holding capacity of the soil, water needs of the crop, the consequence of insufficient water on crop performance (yield), available water for irrigation, and quality of irrigation water.

In plants, water is most important components to plant growth health. Water requirement of a crop is the quantity of water needed for normal growth, cell development, produce yield and supplied by precipitation, irrigation and both. Losses of water in plants will become many problems such as microorganism activity in the soil will be decrease; stomata closed, so that the transpiration process caused as a result accumulation of gases or metabolic wastes increases, leads to death of the plant. Generally, water is last through leaching, drainage, evapotranspiration and runoff. The following disadvantages observed due to water loss so soil becomes very hard therefore, the germination percentage decreased. When the nutrients in the soil leaches or evaporates, the root growth retards, so that plant stunted as a result yields reduced. Under irrigation causes reduction in photosynthesis due to reduction in photosynthetic rate, chlorophyll content and leaf area. Due to under irrigation hormonal balance is altered; reduction in fixation, uptake and assimilation of nitrogen takes place.

Excess irrigation are also causes several changes in the soil and plant resulting in reduced growth and in some cases death of plants. Germinating seeds are sensitive to water logging since they are very dependent on the surrounding soil space for oxygen supply. Effects over watering causes oxygen content in growing media is reduced by the higher average water content in the pores, resulting in damage to the roots. Respiration in the roots change from aerobic to anaerobic with the result, toxic substance accumulates in roots and damages the root system. Permeability of roots decreased due to shortage of oxygen. It results in decreases water and nutrient uptake. Therefore, fertigation technique is a one way to solve all the problems.

Fertigation technique means water and fertilizer are mix together and given at the same time using drip tubes. This technique is a relatively new method that offers several advantages to farmers because water and fertilizer placed more accurately in the root zone, at a slow rate so there is a little or no waste. This technique is economic because less water and less management are required while irrigating. The disadvantages are the added costs of the drip irrigation equipment. Fertigation technique can control the water and fertilizer supply at the optimum requirement need by crops.

The main objective of this study is to determine the best watering frequency of water supply and the best varieties of chilli on growth and physiological aspects grown under rain shelter. The specific objectives of this study are:

1. To assess the effects of increasing frequency of watering application from 4 times to 8 times per day on growth and physiological aspects.

2. To compare the responses of two different varieties of chilli on growth and physiological aspects.

3. To determine the most efficiency variety on water use efficiency.

4. To determine the best watering frequency and the best variety that could gave high yield.
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Native English teacher at Mister Micawber's