Search

The paper analyzes penetration of total solar, T, near infrared and photosynthetically active radiation (PAR). PAR, measured by tube solarimeters at Rothamsted, England in five different crops, includes sugar beet, field beans, kale, and spring wheat. The measurements are used to obtain the sunfleck parameters in Monteith's theory. Crop transmission parameters calculated from the daily radiation totals changed little when crop cover was full.

The article discusses the nutrient budgets for a dry health ecosystem in the south of England. It describes some areas of Calluna heathland in the Poole basin of Dorset. It also gives an account of the estimates of the increased standing crop and accumulation of litter with age. It is said that the above ground standing crop increases to about 24 000 kg/ha and the accumulation of litter to about 17 000 kg/ha after 35 years. Results showing the accumulation of the major plant nutrients in the standing crop and litter are presented. The results are discussed in relation to the building, mature and degenerate phases of development of the vegetation.

The article focuses on the effects of different primary cultivation on several weeds at Wellesbourne in South Warwickshire, England. The aim of the experiment was to determine the effects of different yields of vegetable crops and on soil properties, in which the main comparison in the experiments was based on the three depths of working such as ploughing and rotary cultivation and the treatments with different methods of traction. The result shows that if the production of weed seeds takes place from time to time, and must be regarded as almost inevitable, then the build-up of high particular species is likely to occur rapidly, where rotary cultivation rather than ploughing to the same depth is employed for primary cultivation.

The article investigates the impact of six-years of vegetable cropping on the weed seed populations present in the soil subjected to three long experiments in Warwick, England, from 1953 to 1959. Specifically, it examines the impact of cropping, manurial treatment particularly farmyard manure and fallowing on total number of weed seeds. Experiments include the nitrogen experiment, the NPK (nitrogen, phosphate and potash) experiment and the cultivation experiment. Findings show that the total weed seed population declined during several years of cropping, except for Poa annua, Senecio vulgaris and Stellaria media. Analysis also reveals that application of various inorganic fertilizer treatments have little impact on the weed seed population.

The article presents a study on the effects of manurial and cultural treatments on soil properties and on vegetable crops, including Stellaria media, Poa annua and Chenopodium album. It states that in 1952, the Chemistry section at the National Vegetable Research Station planned three long-term field experiments for the study of the impacts of manurial and cultural treatments on soil properties and vegetable crops. These experiments are conducted in Soakwaters, which is a field of 36 acres in Warwick, England. Results showed that after the first year of vegetable cropping, it was found that the population of vegetable crops had been reduced to 38% of the original level. By the end of the second year of cropping, however, the population had fallen by 19% of that originally present.