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Reduced tillage systems are gaining popularity but weed control is often a limiting factor in the adoption of such systems. Cover crops have become a viable option for sustainable agriculture because ...
This study clarified the effect of planting date on the growth and yield of potato (Solanum tuberosum L.) plants grown from conventional seed tubers (CT) and microtubers (MT). CT of about 50 g and MT ...
Effects of High Ground-Water Level on the Growth and Yield of Supernodulating Soybean Cultivar,Sakukei 4.
Rice cultivars Akitakomachi and Hitomebore were cultivated in the field using an on-farm developed system ; no basal dressing of nitrogen combined with sparse planting (Exp plots). Their growth and yi...
Water chestnut is an aquatic annual herb, and its fresh, edible fruit is a valuable crop. The huge variation in growth and yield of water chestnuts has not been well documented. In this study, the yie...
Effects of Farmyard Manure on Growth and Yield of Turmeric (Curcuma longa L.) Cultivated in Dark-Red Soil,Red Soil and Gray Soil in Okinawa,Japan.
The effects of winter weeds on the growth and yield of direct-seeded rice (Oryza sativa L. cv. Akebono) were evaluated in a no-tillage dry paddy field where Alopecurus aequalis Sobol. var. amurensis (...
The supernodulating soybean cultivar Sakukei 4 was previously characterized by its superior capabilities of nitrogen (N) fixation and photosynthesis, and was expected to be high yielding. Since the N ...
Direct seeding is one possible improvement for future low-cost and labor-saving rice production. This study was conducted to determine whether high yielding cultivars can be adapted to direct seeding...
In 1990, different root pruning treatments in conjunction with shoot pruning and the application of nitrogen and organic materials were carried out on 18-year-old tea plants (Camellia sinensis (L.) O....
To clarify the high yielding characteristics of new rice varieties bred recently in the Tohoku region of Japan, their growth and yield characteristics and dry matter production were examined in 1994 ...
Different root pruning treatments in conjunction with shoot pruning and the application of nitrogen and organic material were carried out on 18-year-old tea plants (Camellia sinensis (L.) O. Kuntze) i...
Field experiments were carried out in 1994, 1995, and 1996 to study the effects of chitin on the growth and yield of rice. The results of experiments in 1994 and 1996 showed that chitin as a basal dr...
Scarcity of water and N fertilizer are major constraints to rice production, particularly in developing countries where rainfed upland condition dominates. Improvement of genetic adaptability to inade...
Because the trading price of low-grade tea has been sluggish, tea cultivation techniques must be aimed to increase the yield and quality primarily of the first crop, which is material of high-grade te...

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