| Dojoo no pH (H2O) to pH (KCl) no atai no sa nani o imisuru no ka? ([Why are pH (H2O) and pH (KCl) soils priced differently?])
| Anonymous. 1986. Kenkyuusho Dayori [Half Annual Report of NGRI]. 22: p. 24.
| More | 215028 |
| Sando guriin zoosei toki ni shiyoosuru keitetsu no shiyoo ryoo ha? ([During the establishment of sand green, what amount of silicon iron is applied?])
| Anonymous. 1986. Kenkyuusho Dayori [Half Annual Report of NGRI]. 22: p. 25.
| More | 215029 |
| Sando guriin no tekiseina toosui sokudo ha? ([What is the suitable water penetration rate for sand green?])
| Anonymous. 1986. Kenkyuusho Dayori [Half Annual Report of NGRI]. 22: p. 25.
| More | 215030 |