In this article we will discuss about the competition of weeds and crops for mineral nutrition, soil moisture and light. Competition for Mineral Nutrients: Analysis of a large number of weeds reported by different authors during the last five decades have shown that the weeds absorb and accumulate mineral nutrients in higher concentrations than the common crop plants. For instance, [...]
Common herbicide application equipment and their calibration: 1. Hydraulic Knapsack Sprayer 2. Blower (Motorised Pneumatic Sprayer) 3. Foot Sprayer (= Pedal Pump Sprayer) 4. Tractor-Mounted Sprayer. Equipment # 1. Hydraulic Knapsack Sprayer: It comprises a 9 to 22.5 1 capacity metallic tank fitted with a manually operated pump; a sieve and a lid on its mouth; and a small delivery pipe [...]
The following points highlight the top five factors affecting weed-crop competition. The factors are: 1. Period of Weed-Crop Competition 2. Weed and Crop Densities 3. Weed and Crop Species 4. Cropping Practices 5. Climatic Influences. Factor # 1. Period of Weed-Crop Competition: Farmers often assume that removing the weeds any time during the growing season shall benefit the crops equally well. Substantial evidence, [...]